Array.prototype.show = function() {
    console.log("后盾人");
};
let arr = []; // new Array
console.log(arr.__proto__ == Array.prototype);
arr.show();
let str = ""; //new String
console.log(str.__proto__ == String.prototype);

let bool = true;
console.log(bool.__proto__ == Boolean.prototype);

let reg = /a/i; // new RegExp
console.log(reg.__proto__ == RegExp.prototype);

let obj = {};
console.log(obj.__proto__ == Object.prototype);

console.log('-----------------------\n')